Improvement zn modwtotg



invented a new and use ILADELPHIA, PENNSYLVANIA.-

12mm raum; Naszso, 1aed october 13,1868.

i IN MQUNTIN'G- SPECTACLE The Schedule referred to in these Letter Patent and making part of the same.

`.Be it known that I, Omarms N. DUNE-luf, of thecity of Philadelphia, and State of Pennsylvania, have Improvement in Spectacles, Eye-Glasses, 8m.; and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being hadto the accompanying draw-l ing, and to the letters of reference marked thereon, making part of this specification.

My invention consists in cementing the pieces B B, to which the. nose-spring C is fixed, and the pieces D D, which serve either'for holding the glasses together, when they are doubled or closed one over' the other, to the glasses A, of either eye-glasses or spectacles. In the case of spectacles, the` pieces D D can be jaws for-holding the arms. I am aware that both eye-glasses and spectacles have heretofore been made without frames, pieces, similar to the pieces B B and D D, being riveted to the glasses in lieu thereof. My invention consistsin vccmeuting theA said pieces to the glasses, -by which very great advantages are derived, both'in the manu@ facture and use rof both eye-glasses and spectacles. When the 'said pieces are riveted on,'th e glasses re-v quire to have suitable rivet-holes previously drilled 'in' which drilling, in a maiority oilinstanoes, 'cracks the glasses. When the pieces are 'riveted to' the glasses 'with a single rivet for eachpiece, .the contact. soon becomes loosened. To employ two rivets, doubles the chances Aof acturing the glasses in drilling. The rivets, to properly fix the pieces to the glasses, mustsnugly and neatly fit the holes drilledin rthe glass.n The consequenceis, when they get heated, as they will, when confined along time about the person, or by chance are exposed to the heat of the sun, they expand and split the glasses. The pieces B B and D D, when cemented to the glasses, cannot be removed without destroyingthem by cracking or laminating. It xis usual to open eye-glasses by springing, which invariably splits the glasses when rivets are usecL-but not when cemented.

WhatI claim as my invention, and desire to secure by Letters Patent, is v The glasses A A, .haying the pieces B B, D D ce'- mented to them, as a new article of manufacture.

, In testimony whereof, I hereunto sign my name'| to this-,specication'in presence of two subscribing wit-f 

